muscle

A sudden, involuntary, and painful muscle contraction often occurring during or after exercise.

The muscle pain and stiffness that develops 24-72 hours after exercise, especially after unaccustomed or intense workouts.

The gluteal muscles (buttocks), serving as the primary engine and stabilizer for running.

An injury to the muscles at the back of the thigh, ranging from a mild pull to a full tear.

Pain in the buttock and leg caused by the piriformis muscle compressing the sciatic nerve.

The quadriceps femoris, the large muscle group at the front of the thigh, crucial for lifting the legs and absorbing impact.